lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 24 Jul 2014 14:02:55 +0200
From:	Maxime COQUELIN <>
To:	Greg Kroah-Hartman <>,
	Jiri Slaby <>,
	Srinivas Kandagatla <>,
	Patrice Chotard <>,,,
Subject: [PATCH 1/2] serial: st-asc: Don't call BUG in asc_console_setup()

In order to prevent an asc instance to be used as early console, BUG_ON is
used on either mapbase or membase being NULL.

Problem is that this condition is also true when we set console to be a ttyASx
different to the first asc instance being probed.

Instead of calling BUG_ON, it now returns -ENXIO when either mapbase or
membase is NULL.

Signed-off-by: Maxime Coquelin <>
 drivers/tty/serial/st-asc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index f48b1cc..2369bc0 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -849,7 +849,8 @@ static int asc_console_setup(struct console *co, char *options)
 	 * this to be called during the uart port registration when the
 	 * driver gets probed and the port should be mapped at that point.
-	BUG_ON(ascport->port.mapbase == 0 || ascport->port.membase == NULL);
+	if (ascport->port.mapbase == 0 || ascport->port.membase == NULL)
+		return -ENXIO;
 	if (options)
 		uart_parse_options(options, &baud, &parity, &bits, &flow);

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists